Screen attachment for rolling-machines.



A. L. LENTZ.

SCREEN ATTACHMENT FOR ROLLING MACHINES.

APPLICATION FILED MAY 8, 1912.

1,0 4, 4 Patented Jan. 20, 191;

Witnesses Inventor Attorneys COLUMBIA PLANOURAPH (10., \vAsmNn'roNj [L c.

'rn srn'rns PATENT o r AMANDUS L. LEN'IZ, onTnnrcHLnRs, PENNSYLVANIA, ASSIGNOR or ONE-HALF T0 AUGUSTUS WOLF AND COMPANY, OF CHAMBERSBURG, PENNSYLVANIA.

. I SCREEN ATraoHMnNT non noLLINe-MAcn INns.

, Specification of Letters Patent. 7 P t t d J 20 1914 Application filed. Ma a wm. Serial No. 695,949.

To all whom it ma y concern: V Be it known that I, AMA DUsL. LENTZ,

a citizen of the United States, residing at Treichlers, in the county of Northampton and State of Pennsylvania, have. invented a new and useful Screen Attachment for Rolling-Machines, of which the following is a specification. A

This invention relates tov improvements in screen attachments for rolling machines The primary object of the invention isto interpose a screen between the distributer and the grinding rolls of arolling machine which Wlll prevent foreign matter from beis to provide a screen which may be readily attached to rolling machines now in use and to so dispose the same that the operator may readily remove the foreign matter which is collected by the screen.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the inven tion. V

In the drawings :Figure 1 is an end elevation partly in section, of a common form of rolling machine, showing the screen disposed between the distributer and the grind ing rolls. Fig. 2 is a perspectiveview of the screen.

In the drawings, 10 designates the rolling machine which receives stock through the spout 11 and delivers the same within the distributer 12. Normally the distributer 12 feeds the material to the rolls 14 and 15, the same being ground between the rolls and entering the hopper disposed at the base of the machine. Rolling mills of this type are provided with the sloping side wall16 which is usually in the form of a plate or panel. In

the present invention this plate or panel 16 is provided with a doorl? which opens at a point adjacent the delivery end of the dis- 'determined'bythe quality of the stock handled by the mill. Screen 22 issecured to the bar 24 which serves as a reinforcing'and attachingbar, this bar being secured to the portion 21 of the machine, frame the Screen being primarily above the roll 15 with its inner free, resilient end extending beneath the delivery end of the distributer 12. It

wil be noted that the free end of the screen 22 is disposed in a horizontal plane which is higher than the plane of the concaved portion of the screen and is in substantially the same horizontal plane as the supporting strip 24, the free end acting as a means to prevent to a certain extent the crowding of the material thereover and thus confining the material within the concaved portion so that as the same falls upon the screen it will. be properly distributed through the meshes of the same during the resilient action imparted to the screen by the falling of the stock. The stock descends through the spout 11 and is fed on the screen by the'distributer 12. The falling stock tends to slightly Shakethe screen, due to the resiliency of the screen, so

that the screen automatically feeds the stock in a thin stream, the screen disintegrating and scattering the stock thereby permitting a more uniform granulation of the same than possible when the stock is fed to the rollsfrom the distributer direct. It will be noted that by disposing a screen at this point all foreign matter such as dough balls, webs, or in fact any foreign material coming through the spout will be prevented from passing to the rolls, thus assuring an even rolling of the same, this reducing pressure on the rolls preventing the same from rolling during the grinding process. The bar not only acts as a reinforcing and supporting medium for the screen, but prevents the stock and tailings from pocketing against the panel 17, and as the greater portion of the screen is above the roll 15 and such roll rotates toward the center of the machine,

the stock falling primarily upon the roll 15 will be directed between both' of the rolls. It has also been found that with a screen disposed at this point, in flour rolling mills, the same serves as a means for whitening the flour, the finished product being of the same degree of whiteness as though nitrates had been used. This is due to the fact that the grain is supplied to the rolls in what may be termed a thin misty stream. It will be noted that the foreign material may be removed from the screen or the screen removed for the purpose of cleaning in a simple and convenient manner, the retaining strip 2a being secured to the portion 21 of the machine in any suitable manner which will retain the same against displacement during the operation or" the mill andwhich will allow the same to be readily lifted out of place when it is desired to remove it from the machine.

The many advantages of a construction of this character will be clearly apparentas itwill be noted that the same may be readily attached to rolling mills now in use without materially altering their construction and that the same will increase the efficiency of the mill in the actual rolling process and will enable the grinding rollers to produce a finer product than heretofore produced, withoutthe use of nitrates or other bleaching chemicals.

Vhat is claimed is In a rolling mill, a supporting structure; grinding mechanism; intermittently operating means for delivering material above the grinding mechanism;. and a resilient, horizontally disposed close-mesh screen interposed between the grinding mechanism and the delivery means, the screen being concaved to'accumulate a load of material as the delivery means fluctuates in its operation, the screen being secured at one end only to the supporting structure, whereby the free end of the screen will vibrate under the weight of the material and deliver the material to the grinding mechanism in an unvarying flow during the varying operation of the delivery means.

In testimony that I claim the foregoing as 59 my own, I have hereto afliXed my signature in the presence of two Witnesses.

' AMANDUS L. LENTZ. Witnesses: J; D. KooNs,

CLEMENT S. FREDERICK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. i 

